Fix virtual/override/final usage in Source/core/html/.

Source/core/html/shadow/MediaControlElements.h

Index: Source/core/html/shadow/MediaControlElements.h
diff --git a/Source/core/html/shadow/MediaControlElements.h b/Source/core/html/shadow/MediaControlElements.h
index 5f72cd0edd2f38c690290c07e01546869d60e726..1d284d07cc41b13da0819351f3aa7353a4d1c51e 100644
--- a/Source/core/html/shadow/MediaControlElements.h
+++ b/Source/core/html/shadow/MediaControlElements.h
@@ -48,8 +48,8 @@ public:
 private:
     explicit MediaControlPanelElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
-    virtual bool keepEventInNode(Event*) override;
+    void defaultEventHandler(Event*) override;
+    bool keepEventInNode(Event*) override;
 
     void startTimer();
     void stopTimer();
@@ -80,7 +80,7 @@ public:
 
 private:
     explicit MediaControlOverlayEnclosureElement(MediaControls&);
-    virtual void* preDispatchEventHandler(Event*) override;
+    void* preDispatchEventHandler(Event*) override;
 };
 
 // ----------------------------
@@ -89,13 +89,13 @@ class MediaControlMuteButtonElement final : public MediaControlInputElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlMuteButtonElement> create(MediaControls&);
 
-    virtual bool willRespondToMouseClickEvents() override { return true; }
-    virtual void updateDisplayType() override;
+    bool willRespondToMouseClickEvents() override { return true; }
+    void updateDisplayType() override;
 
 private:
     explicit MediaControlMuteButtonElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
+    void defaultEventHandler(Event*) override;
 };
 
 // ----------------------------
@@ -104,13 +104,13 @@ class MediaControlPlayButtonElement final : public MediaControlInputElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlPlayButtonElement> create(MediaControls&);
 
-    virtual bool willRespondToMouseClickEvents() override { return true; }
-    virtual void updateDisplayType() override;
+    bool willRespondToMouseClickEvents() override { return true; }
+    void updateDisplayType() override;
 
 private:
     explicit MediaControlPlayButtonElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
+    void defaultEventHandler(Event*) override;
 };
 
 // ----------------------------
@@ -119,13 +119,13 @@ class MediaControlOverlayPlayButtonElement final : public MediaControlInputEleme
 public:
     static PassRefPtrWillBeRawPtr<MediaControlOverlayPlayButtonElement> create(MediaControls&);
 
-    virtual void updateDisplayType() override;
+    void updateDisplayType() override;
 
 private:
     explicit MediaControlOverlayPlayButtonElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
-    virtual bool keepEventInNode(Event*) override;
+    void defaultEventHandler(Event*) override;
+    bool keepEventInNode(Event*) override;
 };
 
 // ----------------------------
@@ -134,14 +134,14 @@ class MediaControlToggleClosedCaptionsButtonElement final : public MediaControlI
 public:
     static PassRefPtrWillBeRawPtr<MediaControlToggleClosedCaptionsButtonElement> create(MediaControls&);
 
-    virtual bool willRespondToMouseClickEvents() override { return true; }
+    bool willRespondToMouseClickEvents() override { return true; }
 
-    virtual void updateDisplayType() override;
+    void updateDisplayType() override;
 
 private:
     explicit MediaControlToggleClosedCaptionsButtonElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
+    void defaultEventHandler(Event*) override;
 };
 
 // ----------------------------
@@ -150,7 +150,7 @@ class MediaControlTimelineElement final : public MediaControlInputElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlTimelineElement> create(MediaControls&);
 
-    virtual bool willRespondToMouseClickEvents() override;
+    bool willRespondToMouseClickEvents() override;
 
     // FIXME: An "earliest possible position" will be needed once that concept
     // is supported by HTMLMediaElement, see https://crbug.com/137275
@@ -160,8 +160,8 @@ public:
 private:
     explicit MediaControlTimelineElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
-    virtual bool keepEventInNode(Event*) override;
+    void defaultEventHandler(Event*) override;
+    bool keepEventInNode(Event*) override;
 };
 
 // ----------------------------
@@ -170,14 +170,14 @@ class MediaControlFullscreenButtonElement final : public MediaControlInputElemen
 public:
     static PassRefPtrWillBeRawPtr<MediaControlFullscreenButtonElement> create(MediaControls&);
 
-    virtual bool willRespondToMouseClickEvents() override { return true; }
+    bool willRespondToMouseClickEvents() override { return true; }
 
     void setIsFullscreen(bool);
 
 private:
     explicit MediaControlFullscreenButtonElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
+    void defaultEventHandler(Event*) override;
 };
 
 // ----------------------------
@@ -186,16 +186,16 @@ class MediaControlCastButtonElement final : public MediaControlInputElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlCastButtonElement> create(MediaControls&, bool isOverlayButton);
 
-    virtual bool willRespondToMouseClickEvents() override { return true; }
+    bool willRespondToMouseClickEvents() override { return true; }
 
     void setIsPlayingRemotely(bool);
 
 private:
     explicit MediaControlCastButtonElement(MediaControls&, bool isOverlayButton);
 
-    virtual const AtomicString& shadowPseudoId() const override;
-    virtual void defaultEventHandler(Event*) override;
-    virtual bool keepEventInNode(Event*) override;
+    const AtomicString& shadowPseudoId() const override;
+    void defaultEventHandler(Event*) override;
+    bool keepEventInNode(Event*) override;
 
     bool m_isOverlayButton;
 };
@@ -206,15 +206,15 @@ class MediaControlVolumeSliderElement final : public MediaControlInputElement {
 public:
     static PassRefPtrWillBeRawPtr<MediaControlVolumeSliderElement> create(MediaControls&);
 
-    virtual bool willRespondToMouseMoveEvents() override;
-    virtual bool willRespondToMouseClickEvents() override;
+    bool willRespondToMouseMoveEvents() override;
+    bool willRespondToMouseClickEvents() override;
     void setVolume(double);
 
 private:
     explicit MediaControlVolumeSliderElement(MediaControls&);
 
-    virtual void defaultEventHandler(Event*) override;
-    virtual bool keepEventInNode(Event*) override;
+    void defaultEventHandler(Event*) override;
+    bool keepEventInNode(Event*) override;
 };
 
 // ----------------------------